EP3077071A1 - Separator - Google Patents
SeparatorInfo
- Publication number
- EP3077071A1 EP3077071A1 EP14868410.3A EP14868410A EP3077071A1 EP 3077071 A1 EP3077071 A1 EP 3077071A1 EP 14868410 A EP14868410 A EP 14868410A EP 3077071 A1 EP3077071 A1 EP 3077071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrate
- water
- metal hydroxide
- hydroxide hydrate
- gel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 392
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 132
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 131
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 241000700605 Viruses Species 0.000 claims abstract description 25
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 19
- 244000005700 microbiome Species 0.000 claims abstract description 16
- 239000011236 particulate material Substances 0.000 claims abstract description 9
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 claims description 73
- 238000000034 method Methods 0.000 claims description 62
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- 239000011148 porous material Substances 0.000 claims description 23
- 230000000717 retained effect Effects 0.000 claims description 20
- 238000005868 electrolysis reaction Methods 0.000 claims description 16
- FTXMHASAYZWVCS-UHFFFAOYSA-L zinc;dihydroxide;hydrate Chemical compound O.[OH-].[OH-].[Zn+2] FTXMHASAYZWVCS-UHFFFAOYSA-L 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 7
- GPRDLRZMTVQCHM-UHFFFAOYSA-L magnesium;dihydroxide;hydrate Chemical compound O.[OH-].[OH-].[Mg+2] GPRDLRZMTVQCHM-UHFFFAOYSA-L 0.000 claims description 7
- UMTMDKJVZSXFNJ-UHFFFAOYSA-N nickel;trihydrate Chemical compound O.O.O.[Ni] UMTMDKJVZSXFNJ-UHFFFAOYSA-N 0.000 claims description 7
- VWGMCGRTCLVGQL-UHFFFAOYSA-L cobalt(2+) dihydroxide hydrate Chemical compound [OH-].O.[Co+2].[OH-] VWGMCGRTCLVGQL-UHFFFAOYSA-L 0.000 claims description 5
- UYHGDFOMPZDFNV-UHFFFAOYSA-L manganese(2+) dihydroxide hydrate Chemical compound O.[OH-].[Mn+2].[OH-] UYHGDFOMPZDFNV-UHFFFAOYSA-L 0.000 claims description 5
- 239000011343 solid material Substances 0.000 claims description 5
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- 238000005516 engineering process Methods 0.000 description 80
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 62
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- 238000000926 separation method Methods 0.000 description 49
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 48
- 230000008569 process Effects 0.000 description 47
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- 235000011389 fruit/vegetable juice Nutrition 0.000 description 45
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- OENHQHLEOONYIE-UKMVMLAPSA-N all-trans beta-carotene Natural products CC=1CCCC(C)(C)C=1/C=C/C(/C)=C/C=C/C(/C)=C/C=C/C=C(C)C=CC=C(C)C=CC1=C(C)CCCC1(C)C OENHQHLEOONYIE-UKMVMLAPSA-N 0.000 description 40
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- TUPZEYHYWIEDIH-WAIFQNFQSA-N beta-carotene Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1=C(C)CCCC1(C)C)C=CC=C(/C)C=CC2=CCCCC2(C)C TUPZEYHYWIEDIH-WAIFQNFQSA-N 0.000 description 40
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- OENHQHLEOONYIE-JLTXGRSLSA-N β-Carotene Chemical compound CC=1CCCC(C)(C)C=1\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C OENHQHLEOONYIE-JLTXGRSLSA-N 0.000 description 40
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- 235000017557 sodium bicarbonate Nutrition 0.000 description 31
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- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 26
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- 239000002609 medium Substances 0.000 description 21
- 241000233866 Fungi Species 0.000 description 20
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 19
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 14
- 150000004677 hydrates Chemical class 0.000 description 14
- 229930195733 hydrocarbon Natural products 0.000 description 13
- 150000002430 hydrocarbons Chemical class 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 238000003306 harvesting Methods 0.000 description 12
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- 239000003651 drinking water Substances 0.000 description 11
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- 239000000839 emulsion Substances 0.000 description 11
- 239000000796 flavoring agent Substances 0.000 description 11
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- 150000003839 salts Chemical class 0.000 description 11
- 239000001052 yellow pigment Substances 0.000 description 11
- 241000219109 Citrullus Species 0.000 description 10
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 description 10
- 235000002767 Daucus carota Nutrition 0.000 description 10
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- UPYKUZBSLRQECL-UKMVMLAPSA-N Lycopene Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1C(=C)CCCC1(C)C)C=CC=C(/C)C=CC2C(=C)CCCC2(C)C UPYKUZBSLRQECL-UKMVMLAPSA-N 0.000 description 10
- JEVVKJMRZMXFBT-XWDZUXABSA-N Lycophyll Natural products OC/C(=C/CC/C(=C\C=C\C(=C/C=C/C(=C\C=C\C=C(/C=C/C=C(\C=C\C=C(/CC/C=C(/CO)\C)\C)/C)\C)/C)\C)/C)/C JEVVKJMRZMXFBT-XWDZUXABSA-N 0.000 description 10
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- OAIJSZIZWZSQBC-GYZMGTAESA-N lycopene Chemical compound CC(C)=CCC\C(C)=C\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C=C(/C)CCC=C(C)C OAIJSZIZWZSQBC-GYZMGTAESA-N 0.000 description 10
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- ZCIHMQAPACOQHT-ZGMPDRQDSA-N trans-isorenieratene Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/c1c(C)ccc(C)c1C)C=CC=C(/C)C=Cc2c(C)ccc(C)c2C ZCIHMQAPACOQHT-ZGMPDRQDSA-N 0.000 description 10
- 239000004411 aluminium Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
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- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/20—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D43/00—Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Definitions
- the present invention relates to a separator.
- the present invention relates to a separator for separating particulate matter and/or hydrophobic material from water or an aqueous solution or from a water-miscible liquid.
- the present invention relates to methods for separating particulate matter and/or hydrophobic material from water or an aqueous solution or from a water-miscible liquid.
- Filtration involves passin water, such as a contaminated water, through a filter medium.
- the Filter medium may comprise a bed or cake of fine material, such as sand of diatomaceous earth. Particles in the water that are larger than the interstitial spaces between, the particles of filter medium become trapped within the filter medium and are removed from the water. The water passes through the filter medium and is typically recovered. However, particles in the water that are finer than the interstitial spaces between the particles of filter medium can pass through the filter medium and are not removed from the water.
- the filter medium starts to become filled and blocked by particles retained from the water.
- A. cake of particles will start to form above filter medium and the cake of particles also acts to filter additional particles from the water.
- the cake of particles above the filter medium increases in thickness as filtering of the water continues,
- Cleaning typically involves a backwash arrangement in which high pressure water is passed, in a reverse direction through, the filter medium to remove the retained particles therefrom.
- nanoporous membranes are very efficient at removing microorganisms, they cm be: expensive to install and often require large pressure drops to achieve reasonable flow rates therethrough. As a result, nanoporous membranes have not found widespread use in the treatment of drinking water supplies,
- a number of technologies are currently used to try to clean oil spills. These technologies include bioremediation, controlled burning, application of dispersants, skimming and centrifugation. However, each of these techniques suffers from one or more difficulties. Bioremediation takes a long time to take effect and does not remove all oil spills, Burning just reduces the amount of oil and does not work in windy conditions. It also causes air pollution. Dispersants are toxic and will increase toxic hydrocarbon levels and will kill fish eggs.
- liquid materials are ofte desired to be separated into component parts so that high-value component parts can be recovered or so that the volume of component parts to be transported can be reduced, or so than that a longer life product can be formed.
- milk powder is prepared from milk by evaporation of water from the milk. Separation requires that the milk be heated and this can cause the milk powder t have a cooked flavour due to caramelisation caused by exposure to heat. Many valuable nutrients in milk may also be lost due to heating.
- Whey can be denatured by heat High heat (such as the sustained high temperatures above 72°C associated with pasteurisation) denatures whey proteins. Some vitamins, minerals and beneficial bacteria can also be lost during the heating process. Spray drying and
- the present invention provides a separator and a method for separating components or microorganisms from liquids that is low cost and highly effective.
- the present invention provides a separator for separating one or more components selected from particulate material, hydrophobic material, non-polar material, microorganisms, or viruses from a mixture of water and the one or more components or from a mixture of a polar liquid and the one or more components, the separator comprising a layer of a metal hydroxide hydrate.
- the present invention provides a method for separating one or more components selected from particulate material, hydrophobic material, microorganisms, or viruses from a mixture of water and the one or more components or from a mixture of a polar liquid and the one or more components, the method comprising causing water or polar liquid from tiie mixture to pass through a layer of metal hydroxide hydrate whilst the one or more components are retained on the layer of metal hydroxide hydrate.
- the metal hydroxide hydrate comprises aluminium hydroxide hydrate.
- the metal oxide hydrate may be selected from one or more of hydrates of magnesium hydroxide, zinc hydroxide, manganese hydroxide, cobalt hydroxide and nickel hydroxide.
- the metal hydroxide hydrate is prepared by generating the metal hydroxide in water or in an aqueous solution to thereby form the metal hydroxide hydrate.
- the present inventors have found that generating the metal h droxide hydrate in-situ results in very effective separation being achieved.
- the metal hydroxide hydrate is prepared by mixing two or more reactants together to thereby form the metal hydroxide hydrate. In some embodiments, the metal hydroxide hydrate is prepared by mixing two or more reaction solutions together to thereby form the metal hydroxide hydrate.
- the metal hydroxide hydrate is formed by electrolysis.
- the separator of the present invention comprises a layer of metal hydroxide hydrate.
- the layer of metal hydroxide hydrate may be retained by a porous retainer.
- the porous retainer acts to retain the metal hydroxide hydrate layer whilst also allowing liquid to pass through.
- the porous retainer may comprise a fabric, a woven material, a foraminous material, a solid material haying one or more holes or pores therein, a porous ceramic material or the like.
- porous retainer The only requirements for the porous retainer are that (a) it does not react adversely with the metal hydroxide hydrate; (b) it does not react adversely with water or aqueous solutions or the polar liquid from the mixture; and (c) the pores not be so large that the metal hydroxide hydrate can pass therethrough.
- the porous retainer will suitably be located downstream from the metal hydroxide hydrate layer (throughout this specification, the terms "downstream” and "upstream” are to be determined in accordance with the normal direction of flow of liquid during use),
- the porous retainer may comprise a geotextile fabric
- the separator may comprise an inlet through, which the mixtur can enter the separator and an outlet through which the water or polar liquid that has passed through the layer of the hydroxide hydrate can exit the separator.
- the separator will be structured such that liquid must pass througli the layer of metal hydroxide hydrate before it can exit the separator. In this manner, only liquid that has passed througli the layer of metal hydroxide hydrate can exit the separator, In this manner, components that cannot pass through the layer of metal hydroxide hydrate cannot leave the separator with the water or polar liquid that has passed through the separator, thereby ensuring separation of the water or polar liquid from the one or more components.
- a layer of metal hydroxide hydrate is very effective at separating the one or more components from water or a polar liquid
- the separator does not separate dissolved materials that are in the water or polar liquid from the water oi the polar liquid. It has been found that dissolved materials passed through the separator with the water in the polar liquid. For example, if the mi xture comprises a salt soluti on mixed with the one or more components, the dissolved salt will pass throug the separator with the water in which the salt is dissolved.
- the mixture comprises a mixture of an aqueous solutio and the one or more components.
- retainer is placed above or upstream of the 1 ayer of metal hydroxide hydrate.
- the retainer may comprise a fabric,- a woven material . , a foraminous material, a solid material having one or more holes or pores therein, a porous ceramic material, a mesh material or the like.
- the retainer upstream of or at the top of the layer of metal hydroxide hydrate may prevent disruption of the layer during addition of the mixture on top of the layer.
- the retainer at the to may also be used to provide a separate layer separating the retained material from the layer of metal hydroxide hydrate, This may allow for easy removal of the retained components from the l ay er of metal hydroxide hydrate in circumstances where it is desirable to recover the retained material (for example, if the separator is being used to separate valuable components from the mixture).
- the upstream retainer may allow the separator to be backwashed without losing the metal hydroxide hydrate layer during the backwash step.
- the metal hydroxide hydrate l yer in being positioned between two retai ners, ma be flipped or inverted to thereby allow further flow of filtrate therethrough to clean away and accumulated material.
- the layer of metal hydroxide hydrate is in the form of a layer of metal hydroxide hydrate gel.
- the metal hydroxide hydrate gel may comprise a thick gel or a thin gel.
- the layer of metal hydroxide hydrate may be of any desired thickness.
- the present inventors have demonstrated that the metal hydroxide hydrate layer may be as thin as I micron and still produce good results.
- the layer of metal hydroxide hydrate may have the thickness of from 1 micron to I metre or more, or from 1 micron to 50cm, or from 1 micron to 30 cm or more, or from. 1 micron to 10 cm, or from 1 micron to 5 cm,, or from 1 micron to 10 mm, or from! micron to 5 mm, or from 1 micron to 1 mm.
- the present inventors have found that the flow rate of filtrate through the layer of metal hydroxide hydrate increases as the thickness of the layer of metal hydroxide hydrate decreases.
- the layer of metal hydroxide hydrate may have a minimum thickness of 1 micron, or 5 microns, or 10 microns, or 50 microns, or 100 microns, or 250 microns, or 500 microns or 1mm,
- the layer of metal hydroxide hydrate comprises a continuous layer of metal hydroxide hydrate. Providing such a continuous layer means that short-circuiting, bypassing or channelling through the metal hydroxide hydrate layer is likely to be avoided, thereby ensuring that all filtrate has passed through the metal hydroxide hydrate layer.
- Metal hydroxide hydrates and particularly metal hydroxide hydrate gels comprise atoms of metal hydroxide having a number of water molecules trapped between a net of the hydroxide molecules. However, it is believed that the water molecules are not strongly bonded to the hydroxide molecules. Water molecules are very small with a very low molecular weight of 18 g/ ' mo and a very small molecular diameter of about 2.75 A.
- Figure 1 shows a hypothetical model of the molecular structure of an aluminium hydroxide hydrate.
- the molecules of aluminium hydroxide are shown at reference numeral "a”.
- Water molecules (“b” and “c” in figure 1) are attracted to the positive and negative charges of the aluminium hydroxide molecules. Therefore, the water molecules are not strongly bonde to the aluminium hydroxide molecules and can easily and naturally leave the aluminium hydroxide hydrate.
- the present inventors believe that water can easily pass through a layer of aluminium hydroxide hydrate without any need for vacuum or pressure, whilst other sub-micron and, nano- or pico- sized contaminants (such as al ae, bacteria, fungi, viruses, spores and other small single or multicellular organisms and particulate material) cannot pass through the layer of aluminium hydroxide hydrate.
- Gravity and/or pressure applied to the liquid mixture assist in driving water through the liquid mixture.
- the electric charges of the aluminium hydroxide molecules are also believed to be another driving force.
- the electric charges of th aluminium hydroxide molecules attract water molecules close to the top surface of the layer of the aluminium hydfoxide hydrate.
- the number of water molecules associated with each molecule of metal hydroxide in the hydrate may vary, because over time, water ma naturall separate from the hydrate or water may enter the hydrate.
- dilute fresh aluminium hydroxide hydrate that has been manufactured from the electrolysis of salty water contains almost approximately 300 molecules of water for each molecule of aluminium hydroxide.
- the hydrate layer will be compressed when it is being used to separate water from mixtures and the hydrate layer may be converted to a creamy gel-like material, which occurs because the number of water molecules for each molecule of aluminium hydroxide will be decreased. It is also believed that the conditions used to perform the metal hydroxide hydrate may affect the number of water molecules associ ated with each molecule of metal hydroxide.
- the metal hydroxide hydrate may be in the form of a gel
- the gel may have an appearance similar to a thin cream, such as a thin face cream. When spread out over a surface (e.g. rubbed between fingers) the gel feels wet, similar to a thin cream, but then tire water rapidly/ evaporates leaving only the etal hydroxide behind.
- the metal hydroxide hydrate may have at least 10 molecules of water associated with each molecule of metal hydroxide.
- the metal hydroxide hydrate may have at least 16 molecules of water associated with each molecule of metal hydroxide , more preferably at least 20 molecules of water associated with each molecule of metal hydroxide, even more preferably at least 30 molecules of water so say with each molecule of hydroxide, even more preferably from 30 to 400 molecules of water associated with each molecule of metal hydroxide, even more preferably from 3? to 300 molecules of water associated with each molecule of metal hydroxide, or from 37 to 90 molecules of water associated with each molecule of metal hydroxide.
- Figure 1 shows a hypothetical model of the molecular structure of an aluminium hydroxide hydrate
- Figure 2 shows a photograph of the separation system used in example 2
- Figure 3 shows photographs of bacterial and fungal growth tests, with figure 3 a showing bacterial growth tests conducted on Brisbane River water, figure 3b showing bacterial growth tests conducted on filtrate recovered from Brisbane River water that has passed through a layer of aluminium hydroxide hydrate, figure 3c showing fungal growth tests conducted on Brisbane River water and figure 3d showi g fungal growth tests eonducted on filtrate recovered from Brisbane River water that has passed through a layer of aluminium hydroxide hydrate;
- Figure 4 shows a plot of water height change and water height change rate against time for the experiment set out in Example 4.
- Figure 5 is a photograph showing the layer of aluminium hydroxide hydrate gel and the layer of separated solids on top of the gel following filtration of Brisbane River water through the gel;
- Figure 6 shows a perspective view of a possible design of a water treatment plant incorporating separation technology in accordance wi th an embodiment of the present invention
- Figure 7 shows a side view of the water treatment plant shown in figure 6;
- Figure 8 shows PGR results obtained from example 5.
- Figure 9 shows a photograph taken at the end of the experimental run of example 7.
- Figure 10 shows a photograph taken at the end of the filtration process in which milk is passed through a layer of aluminium hydroxide hydrate
- Figure 1 1 shows separation of beta-carotene and solids from carrot juice using hydrate filtration in accordance with an embodiment of the present invention
- Figure 12 shows separation of pomegranate juice pigments using hydrate filtration in accordance with an embodiment of the present invention
- Figure 13 shows lycopene red pigments of tomato juice separated from water using hydrate filtration technology in accordance with an embodiment of the present invention
- Figure 14 shows mint juice extracted and filtered by hydrate filtration using hydrate filtration technology in accordance with an embodiment of the present invention, with menthol and pigments collected on top of the gel ;
- Figure 14a shows a photograph of the concentrated coffee that was recovered from the top of the metal hydroxide hydrate layer following filtration of coffee with no applied pressure;
- Figure 14B shows a photograph of the concentrated coffee that accumulated on top of the metal hydroxide hydrate layer following pressure filtration of coffee
- Figure 15 shows a photograph of algae cell s retained on top of the hydrate gel following separati on of the algae cells
- Figure 15 A shows a photograph of the Nile red-stained oil that was collected on top of an aluminium hydroxide hydrate filter from an oil in. water emulsion
- Figure 16 shows a photograph of a side view of the hydrate get after removal of Sce-ned smm algae cells
- Figure 1 ? shows a graft of filtrate flu versus pressure for an experiment using a separator in accordance with one embodiment of the present invention
- Figure 18 shows a graph showing natural unenforced evaporation of different metal hydroxide hydrates
- Figure 19A shows a graph of filtrate volume versus time for filtration of Brisbane River water using a applied pressure of 40 psig. and a hydrate thickness of 1 mm;
- Figure 19B shows a graph of filtrate flux versus time for Filtration of Brisbane Ri ver water using an applied pressure of 40 psig and a hydrate thickness of 1 mm;
- Figure 19C shows a graph of filtrate volume versus time for filtration of Brisbane River water using an applied pressure of 40 psig and a hydrate thickness of 10 mm;
- Figure 19D shows a graph of filtrate flux versus time for filtration of Brisbane River water using an applied pressure of 40 psig and a hydrate thickness of 10 mm;
- Figure 20A shows a view of the bottom section of a filtration unit used in one embodim ent of the present invention
- Figure 2QB is a view showing the bottom section shown in figure 20A having a sintered titanium disc sealed into separator vessel;
- Figure 20C i s a photograph showing a very thin hydrate a layer of thickness under 500 microns formed on the sintered titanium disc;
- Figure 20D is a photograph showing the pores of the sintered titanium disc under a microscope (magnification XI 0);
- Figure 20E i s a photograph showing the retentate obtained by filtering carrot j uice througli the separator shown in figures 20A to 20D with a hydrate layer of thickness of under 500 microns;
- Figure 21 shows a view of separate bottle parts that can be used to make a device suitable for generating sanitised water for use in emergency situations;
- Figure 22 shows the bottle parts of figure 17 connected together for normal use
- Figure 23 shows the bottle of figure 18 in which the to and bottom portions have been unscrewed, the top portion inverted and then connected to the bottom portion to enable water to be filtered and a clean filtrate to be collected in the bottom portion of the bottle;
- Figure 24 shows a more detailed view of the top of the bottle shown in figure 17 with the cap removed;
- Figure 25 shows details of a cap having a metal hydroxide hydrate gel sealed underneath a removable seal
- Figure 26 shows a side view of a fil ter unit in accordance with any embodiment of the present invention.
- Figure 27 shows a basic design of a hydrate -based separator in accordance with an embodiment of the present invention
- Figure 28 shows a schematic view of an alternative separator design in accordance with an embodiment of the present invention.
- Figure 29 shows a schematic view of another separator design in accordance with an embodiment of the present invention.
- Figure 30 shows a schematic view of another separator desi gn in accordance with an embodiment of the present invention.
- the metal hydroxide hydrate was produced in-situ by generating the metal hydroxide in water or in an aqueous solution.
- the metal hydroxide hydrate was in the form of a gel .
- hydrate gel , “gel” and similar terms are used interchangeably with the term “metal hydroxide hydrate”. All uses of these terms in the following description of the samples shall b e taken to be a reference to the layer of metal hydroxide hydrate that is used to separate components from the mixture.
- filtration hydrate filtration system
- gel system gel filtration
- gel filtration system and similar terms such- as “filter” and li separation
- Aluminium hydroxide is an inorganic, non-toxic compound that is insoluble in water with a molecular weight of 78. Over 100 million tons of aluminium hydroxide is produced each year and over 90% of that is converted to aluminium oxide for use i the manufacture of aluminium metal (the bulk of that aluminium hydroxide that is calcined to form aluminium oxide and subsequently converted to aluminium metal is made using the Bayer process). Aluminium hydroxide is used as a feedstock for the manufacture of other aluminium compounds, such as calcined alumina, aluminium sulphate, polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate, activated alumina and aluminium nitrate.
- Aluminium hydroxide can be made by the electrolysis of saline water (having a salinity normally in the range of from 30 to 70 parts per thousand, PPT) using aluminium electrodes and DC current.
- a DC current from 3 to 12V (preferably 9V) and 1 Amp current can be used. It will be appreciated that a wide range of conditions can be used.
- Aluminium hydroxide can also be produced by mixing aluminium sulphate (a salt that is used to reduce soil pH in gardening and also as an antacid for heart burn) and sodium bicarbonate (baking soda) solutions. Both aluminium sulphate and sodium bicarbonate are very low cost and remarkably non-toxic chemicals. The following reaction will occur:
- aluminium hydroxide hydrate will quickly form.
- concentration concentration of aluminium sulphate solution and sodium bicarbonate solution used to form the aluminium hydroxide
- concentration and thicknesses can be made for different applications. For example, at 20°C, the solubility of aluminium sulphate and sodium bicarbonate in 100 mL of water are 36,4 g and 1.6 g, respectively.
- This aluminium hydroxide hydrate is more compressed and has less water molecules for each molecule of aluminium hydroxide compared to a hydrate made at 2Q ⁇ > C.
- the ratio of aluminium hydroxide to water molecules is higher and therefore the electric charges of alu i ium hydroxide on each water molecule is higher and retention of water molecules is stronger than in the aluminium hydroxide hydrate which is made at 20°C. It may also be possible to mix the ingredients in a pressurised heated reactor to increase the solubility of the ingredients to make a very dense and highly charged metal hydroxide hydrate,
- aluminium hydroxide by mixing solutions of aluminium sulphate solutions of sodium bicarbonate at 20°C and 100°C.
- the aluminium hydroxide hydrate produced at 20°C (room temperature) has a formula of approximately Al(OH)j x 90 3 ⁇ 40 (i.e. about 90 molecules of water for each molecule of aluminium hydroxide).
- the aluminium hydroxide hydrate produced at 1QQ°C has a formula of approximately Al(OH3 ⁇ 4 x 37 3 ⁇ 40 (i.e. about 37 molecules of wate for each molecule of aluminium hydroxide).
- the number of water molecules and aluminium hydroxide molecules of the different hydrate formulas was determined by weighin different samples before and after f eeze-drying.
- normal hydrate or “normal gel” are used to refer to a hydrate that is formed at 20°C.
- thicker hydrate or “thicker gel” are used to refer to a hydrate that is formed at near 100°C.
- An aluminium hydroxide hydrate was prepared using solutions of aluminium sulphate and sodium bicarbonate.
- the aluminium hydroxide hydrate was retained o a porous geotextile fabric.
- a glass housing having an open top and an open bottom was positioned such that the geotextile fabric extended across the open bottom. In this manner, the layer of aluminium hydroxide hydrate was located at the bottom of the glass housing.
- a collection beaker was positioned underneath the geotexti le fabric to collect any liquid that passed through the layer of aluminium hydroxide hydrate.
- the geotextile fabric that was used to support the layer of aluminium hydroxide hydrate had a 90 micron pore size (polypropylene 260 gsm nonwoven geotextile) and this is a very inexpensive geotextile fabric.
- other media or fabrics ca also be used, based upon the specific application design flow rates and the required strength of the retaining media, to support the hydrate layer.
- Lennox LB is a highly referenced microbial growth medium used for E. coli and bacterial cultivation. This nutrient-rieh microbial, broth, contains peptides, amino acids, water-soluble vitamins, and carbohydrates in a low-sal t formul ation. The addition of agar provides a solid medium lor mi crobi al growth . LB medium was made by mixing 10 g tryptone, 5 yeast extract, 15 g Agar, 10 g NaCl in 950 n L of deionized water.
- the solution was autoclaved for 20 mins at 15 psi, 121°C and after being cooled to 55 a C was poured in petridishes, and stored in a cold dark roorti at +4°C.
- Potato Dextrose Agar (PD ) medium was used. PDA is the most widely used medium for cultivation of fungi. PDA medium was prepared by adding 4 g of potato extract (200 g of infusion from potato), 20 g of Dextrose and 15 g of Agar to 1 L of purified water. The solution was autoclaved at 121 °C and after being cooled to 55° ' C was poured into petri dishes and stored in a cold dark roo at +4°C.
- Aluminium hydroxide hydrate was made by electrolysis of saline water with a concentration of 70 PPT (70 g NaCl solved in 1 L of distilled water) using aluminium electrodes (or at least an aluminium anode). A DC current of 9 V and 1 amp was used during electrolysis. Aluminium hydroxide hydrate was also prepared by mixing saturated solutions of aluminium sulphate and sodium bicarbonate made at room temperature (20 °C). 36.4 g of aluminium sulphate was mixed in 100 mL of disti lled water and 53.76 g of sodium bicarbonate was mixed in 560 mL of distilled water, Aluminium sulphate solution was added gradually to the sodium bicarbonate solution.
- the mixed solutions were left for about 2 hours to allow all COi molecules to separate.
- the reaction-based gel solution was added on top of a geotextile fabric and washed with distilled water to remove any imreacted aluminium sulphate.
- the same amount of 20 mL of electrolysis-based aluminium hydroxide hydrate and reaction-based aluminium hydroxide hydrate was used for each experiment.
- the simple filtration equipment used for tests is shown in figure 2.
- a 90 micron nonwoven geotextile was fixed at the bottom of a round plastic container with a di meter of 76 mm,
- aluminium hydroxide hydrate was added on top of the geotextile fabric and Brisbane Ri ver water was added on top of the hydrate gel.
- the fi rst 50 mL of the filtrate was not collected to allow for removal of water molecules that were already present in the hydrate.
- the same volume (100 microliters) of Brisbane river water before filtration and after filtration was added to each LB and PDA plates. LB plates were put in an incubator for 24 hours and PDA plates wrapped by aluminium foil and left in a room for one week.
- FIG. 3 shows LB bacteria and PDA fungi tests results on Brisbane river water before and after filtration b aluminium hydroxide hydrate made by electrolysis. After 24 hours, growth from hundreds of bacterial colonies was observed from water before filtration (figure 3 a) but no bacterial colony growth came from the filtrate (figure 3b) Similar results were observed on PD fungi test plates after one week. Some fungal growth came from the Brisbane River water before filtration (figure 3c), but no fungal growth came from the filtrate (figure 3d) and all fungi were also trapped by this system. Therefore, all suspended solids and bacteria and fungi i the Brisbane River water were captured and no bacteria! colonies or fungal growth were observed in all tests after aluminium hydroxide hydrate filtration. Therefore, the water was considered completely sterilised by passing through the homogenous layer of aluminium, hydroxide hydrate.
- the aluminium hydroxide hydrate did not kill the bacteria. Rather, as no bacteria were detected in the filtrate, the aluminium hydroxide hydrate layer prevents passage of bacteria through that layer.
- the white layer comprises the layer of aluminium hydroxide hydrate gel and the brown layer on to comprises the suspended solids and particulate material that has been removed from th river 3 ⁇ 4?ater: Water treatment plants have sludge thickening units for dewatering of the sludge for ease of transportation.
- This thick dewatered sludge also prove that using this process, no sludge thickening unit may be needed for future large-scale water treatment plants based on the present invention.
- Commercial water treatment plants may uti lise a thick metal hydroxide layer, for example, 1 metre thick, or even thicker. This layer may be cleaned by scooping or scraping the built-up material off the top of the layer. Thick layers of metal hydroxide hydrate may also be used in other applications.
- This technology can simplify conventional overly complicated and expensive water treatment processes into a simple single step process.
- a simple sedimentation tank or similar compartments (such as a flmnei-like tower with less surface area for the ease of operation, and less gel consumption) can be used instead of current complex water treatment plants.
- a variety of different shapes that vary from a simple bucket to more complicated filter equipment using vacuum of rotary drum filters may be used for water purification using hydrate filtration in aecordance with the present invention.
- one simple bucket may solve the safe drinking water problem of a large family in developing countries.
- Hydrate gel may be kept between two types of fabri cs or fi lter media.
- a bottom small pore size fabric retains the gel and a top higher pore size fabric (to avoid clogging and blinding) retains suspended solids and contam inants and prevents breakage of the gel layer during filling.
- a ring which is cut from another similar bucket may keep the top fabric fitted in the system.
- a sedimentation tank 200 m diameter with a height of 10 m, can be designed. It can also be used in combination with conventional water treatment systems. It can be added as final stage for sanitation and clarification to remove any remaining traces of suspended solids and bacteria, viruses and pathogens in water. Because some pathogens are chlorine resistant, the final product of disinfection using this technology may be safer for drinking compared to chlorine-disinfected water.
- chl orine-resistant pathogens include a variety of viruses, parasites and bacteria that can cause hepatitis, gastroenteritis,
- M13K07 Helper Phage virus from NEB Biolabs
- 20 mL of distilled water was added to 20 mL of distilled water and mixed and added to the top of a thicker hydrate gel (made at 100 °Q, Based on M13K07 DNA sequence, forward and reverse primers were designed.
- Phusion PCR was used for these tests.
- a master mix was made b mixing 7.2 ⁇ of water, 4 ⁇ , of 5*HF Buffer, 1.6 ⁇ , of dNTPs, 2 ⁇ !_ of forward, 2 of reverse primers, and 0.2 ⁇ -L of Phusion polymerase enzyme (Thermo Scientific). 3 pL of each sample was added to the master mix and was poured into PCR tubes and placed in a PCR machine.
- the Phxision PCR program was 98°C for 30 s, fbilovved by 35 cycles (98°C for 10 s, 65°C for 30 s, and 72°C for 30 s) and 72°C for 10 mins, and 16° C for an extended time.
- PCR results show no traces of virus: DNA in the filtrate, while the controls show that phage DNA was readily amplified.
- Fig, 8.1 shows the wide-range DNA ladder.
- Fig. £.2, fi 8.9, fig.8 ⁇ .11 show amplified phage DNA in controls (no filtration).
- Other columns (fig.8.3, 8,4, 8.5, 8,6, 8,7, 8.8, 8,10) contained different filtrate samples that show no traces of phage DNA amplifications.
- Fig. 8.2 is a filtration liquid control (3 pL of phage solution + 20 mL of water). It was kept on iee during the time of filtration and was not used for filtration.
- Fig 8.9 is the same control that was kept art .room temperature (25 °C) during filtration.
- Fig.8.11 is another higher concentration phage control made by adding 3 pL of phage solution to Phusion PCR master mix. ( 1 7 ⁇ , ⁇ .
- the cost of hydrate filtration technology in accordance with the present invention is very low compared to conventional technologies for cleaning oil spills. It can be implemented on different ships and treated water can be directly pumped back to the ocean while oil separated from the water can be collected in storage tanks. Specific ships for this system can also be designed. Hydrate filters can break oil-water emulsions, so it will remove oil spills. Therefore, unlike centrifugation processes, the filtrate water obtained using the technology of the present invention can be pumped back to the ocean. This technology also recovers the oil, which is a major advantage compared to other conventional solutions such as bioreniediation, burning and dis ersants.
- a thicker hydrate gel made by mixing stoichiometry saturated solutions of aluminium sulphate and sodium bicarbonate at 10Q°C, was used for thi s experiment, 30 mL of this hydrate gel was added to the top of a porous geotextile fabric and placed in a vessel having an open top and an open bottom, 50 mL of Shell Helix HX3 20-50 motor oil was vigorously mixed with water (50% oil+50% water) to form a partial oil i water emulsion. The resulting oil- water mixture was added on top of the hydrate gel and allowed to be filtered.
- Hydrate gel filters in accordance with the present invention do not let non -polar liquids that are not water-soluble pass. Therefore, because most liquid hydrocarbons are non- polar and insoluble in water, they can be captured by hydrate filtration.
- One application for this technology is to -remove water from jet fuel (which is kerosene). Removing all water from, jet fuel is impractical using current technologies. Water in jet fuel i a critical problem and there have bee several accidents, such as the crash of British Airways Flight 38, that have occurred because water in the jet fuel froze.
- the separation system of the present invention can remove the last drops of ' water from jet fuel. Using this technology, numerous other liquids can be separated from water based on their relative polarity.
- Figure 9 shows a photograph taken at the end of the experimental run.
- clear water can be seen at the bottoffl and a bl ue layer of kerosene can be seen as being retained on top of the layer of hydrate gel,
- Chlorophyll is a compound that has hydrophobic tail region it also has a polar hydrophilic head group and is water soluble. 100 m:L of Chlorophyll a was added on top of 50 mL of thicker hydrate gel (made at near 100 °C). The same filtration equipment used for previous experiments was used for this test. Chlorophyll molecules passed the hydrate gel as expected.
- Bexane is a non-polar colourless hydrocarbon liquid; therefore it should not pass the hydrate filter.
- Hexane was mixed with water and added to the top of the hydrate gel . Because hexane evaporates very fast under a fume hood, the top section of the filtration equipment was sealed with aluminium foil, masking tape and Parafilm. Similar to the kerosene experiment, water molecules passed through the hydrate filter but hexane molecules could not pass the hydrate and were retained on the hydrate layer. The filtration equipment was left for a long period of time under the fume hood, but even after one week no drop of hexane passed the hydrate filter. Similar results were observed using normal aluminium hydroxide hydrate gel (made at 20 °C),
- Milk powder made by current evaporation and heat drying such as drum drying, has a cooked flavour due to caramelisation caused b heat exposure. Many valuable nutrients in milk may also be lost due to heating, Whey can also be denatured by heat. High heat (such as the sustained high temperatures above 72°C associated with the pasteurisation process) denatures whey proteins. For example, due to heating during pasteurisation, some vitamins, minerals, and beneficial (or probiotic) bacteria can be lost (thiamine and vitamin B12 is reduced by 10% and vitamin C by 20%).
- Conventional milk powder manufacturers use evaporators followed by spray- drying into a heat chamber . Milk is applied as a thin film to the surface of a heated drum, and dried milk solids are then scraped off.
- the product of milk treated using hydrate filtration in accordance, with embodiments of the present invention is a very thick creamy paste that can be easily dried using a simple natural air-drying with unhealed forced air or solar drying. Therefore, the milk powder produced by hydrate filtration does not have an unpleasant cooked flavour like conventional milk powders that are currentl available in the market.
- the dairy products made by this process and ultrafiltration have better health quality than conventional processes because they keep heat- sensitive components in the product ' .
- Ultrafiltration technology makes high quality products similar to hydrate filtration. However, ultrafiltration technology is very expensive and cannot be implemented in small factories and remote farms, whilst a simple hydrate filtration system in accordance with the present invention can be implemented at very low cost anywhere without the need for expensive equipment.
- Figure 10 shows a photograph taken at the end of the filtration process. Fi ltrate water is more clear compared to milk before filtration. Concentrated milk solids and fats are captured on top of the hydrate gel. Similar results are observed using normal hydrate gel (made at 20 °C).
- the present invention offers a ne low cost process for separation of high value products from natural sources based on their polarity and solubility in water,
- the health food products market is large and growing quickly. For example, the global market for earotenoids is $1 ,4 billion per annum. Extracting high value products such as beta-carotene from natural sources is very difficult. Different new pharmaceutical products, such as drugs and health and beauty products, can be made using the technology of the present invention.
- the cosmetics industry is also a large business and currentl generates an estimated annual turnover of US$.170 bi llion.
- a variety of different new cosmetics products such as skin-care creams, Joti os, powders, perfumes, lipsticks and make-up blushes from natural sources can be made from ingredients obtained using the technology of the present invention. Compared to petroleum-based cosmetics products, these products are believed to have better health and nutritional skin care effects.
- Figure 1 1 shows separation of beta-carotene-containing solids from carrot juice using hydrate filtration. Orange pigments of beta-carotene are captured on to of the hydrate gel. Beta- carotene is a non-polar molecule and therefore cannot pass the hydrate filter. Conventional separation technologies such as centrifugation cannot separate beta-carotene molecules from carrot juice; high temperature evaporation of carrot juice denatures beta-carotene molecules and produces a gum-like material .
- Lycopene is another valuable bright red carotenoid pigment found in tomatoes and other red fruits and vegetables such as red carrot, red bell peppers, water melon, gac and papayas (but not strawberries). Lycopene molecules are non-polar and therefore cannot pass the hydrate filter and will collect on top of hydrate gel after filtration. Lycopene red pigments of tomato j uice are also easily separated from water using hydrate filtration technology (see figure 13). Lycopene has been shown to be also good for ski health, UV protection, skin cancer prevention and acts as an anti -aging and anti -wrinkle agent. Lycopene tablets are expensive (about US$50 for 30 tablets).
- lycopene After separation of lycopene by filtration of different lyeopene-rich juices, such as tomato or watermelon, a variety of different cosmetic products such as anti-aging or anti-wrinkling creams. soaps, shower gels and shampoos, or toothpastes can be manufactured. Healt hazards are a concern for many conventional make-up and cosmetic products. Using hydrate filtration, a variety of natural ingredient makeu products Such as blushes and lipsticks can be made. These high value make-up products can be specificall made for luxury markets. Concentrated tomato juice can also be air dried and sold as lycopene tablets,
- Menthol is another insoluble organic compound which can he extracted using this technology. Menthol demand exceeds supply and has a large market including chewing gum and candy products. Mint juice was extracted and filtered by hydrate filtration. Menthol and other pigments collected on top of the gel (figure 14). Similar results were observed using normal hydrate gel (made at 20 °C).
- capsaicin was separated from red chilli pepper juice.
- the red peppers crushed and the red juice separated and filtered in accordance with the present invention.
- 50 mL of the red pepper juice was added on top of hydrate gel and allowed to be filtered. This resulted in the separation of capsaicin-containing solids from red pepper juice.
- the filtrate was clear without any signs of red pigments. No red pigment could penetrate into the depth of hydrate and everything is concentrated, on top of the hydrate l yer.
- Apricot is another carotenoid rich fruit.
- Apricot juice was separated concentrated using a hydrate filter. 50 mL of apricot juice was added on top of gel and allowed to be filtered This resulted in the separation of beta-carotene-containing solids from apricot juice. Similarly the filtrate was clear without any signs of yellow pigments. No yellow pigment could penetrate into the depth of hydrate and everything is concentrated on top of hydrate the layer,
- Papaya is another beta-carotene and lycopene rich fruit.
- Papaya j uice was concen trated/ separated u sing a hydrate filter. 50 mL of papaya j uice was added on to of gel and allowed to be filtered. This resulted in the separation of beta-carotene-lycopene-contaiiiing gelatinous solids from papaya juice. Similarly the filtrate was clear without any signs of pigments. No pigment could penetrate info the depth of hydrate and everything is concentrated on to of the hydrate layer.
- Mango is another beta-carotene rich fruit. Mango juice was concentrated/separated using a hydrate filter.
- Rockmelon is another beta-carotene rich fruit. Rockmelon j uice was
- Guava juice was separated/concentrated using a hydrate filter. 50 mL of guava juice was added on top of gel and allowed to be filtered. Concentrated guava juice was collected on top of the hydrate gel layer. Similarly the filtrate was clear without any signs of pigments. No pigment could penetrate into the depth of hydrate and everything is concentrated on top of the hydrate layer.
- It can be used as a base for making variety of new food, health food and beauty, or cosmetic products, such as coffee breakfast spreads (similar to Nutella® chocolate spreads), beauty creams, moisturising creams, sun protection creams, hand washing liquids, shower gels, shaving foam, tan sprays, and shampoos. It can be dried easily to make a substance similar to Nescafe®, This dried concentrated coffee can he marketed as an instant coffee similar to Nescafe®.
- Figure 14A shows a photograph of the coffee concentrate recovered from the top of the hydrate layer.
- the final product can be used to make various food or cosmetic products. For example, different dosages of the concentrated spent coffee were added and mixed to different fragrant free base creams, shower gels, hand washing liquids, or other fragrance free cosmetics formulas for making cosmetics, and different cosmetic products.
- the final product has the fragrance and scent of fresh coffee and various health benefits compared to conventi onal petroleum based cosmetic products.
- the cosmetic products that we made in this way are very stable after very long periods of time and no mould and bacteria growth happened. After several months they still have a smell of fresh coffee as the soaps, shower gel, beauty cream formulas preserve the concentrated coffee.
- a variety of new products such as natural pigments, health food additives, and new skin care beauty creams from natural sources can be produced based on the technology of the present invention. It is also possible to extract and discover new components from natural sources. Other new concentrated food products can also be made using this technology. For example, conventional processes for making tomato paste use high temperature that destroys several healthy nutrients and vitamins. Heat-sensitive vitamins and nutrients will be preserved in new types of tomato paste made using hydrate filtration technology.
- carrot juice was centrifuged for 10 minutes at 4000 i pni (10,000 x g) and no beta-carotene pigment removal was observed.
- plasmid DNA with a length of about 3000 bp was used for this experiment. Hydrate filter gel captures non-polar water-i soluble molecules such as beta-carotene. But water-soluble inorganic molecules such as salt, sugar and chlorophyll passes through the hydrate gel filter. This experiment assesses if the hydrate gel can capture long soluble molecules such as DNA.
- the plasmid was added to water and polymerase chain reactio (PGR) tests were performed to amplify the plasmid in the filtrate to see if there are any traces of plasmid DNA that could be amplified from the filtrate or if any plasmid passes the hydrate gel filter.
- PGR polymerase chain reactio
- Phusion PCR was used agai for these tests.
- a master mix was made b mixing 7.2 pL of water, 4 pL of 5xHF Buffer, 1,6 pL of dNTPs, 2 pL of forward, 2 p.L of reverse primers, and 0.2 pL of Phusion polymerase enzyme.
- 3 pL of each sample was added to a master mix and transferred into PCR tubes and placed in a PCR machine.
- the Phusion PCR program was 98 °C for 30 s, followed by 35 cycles (98 °C for 10 s, 65 °C for 30 s. and 72 °C for 30 s) and 72 °C for 10 min, and 16 °C for an extended period of ti me,
- PCR results showed no traces of pl asmid DNA in the filtrate, while the positive controls showed that plasmid DNA was amplified. Therefore, these results demonstrate that plasmid DNA molecules are captured by the hydrate gel filter.
- the hydrate filter gel can also capture long water-soluble molecules such as DNA. It is speculated that the long water-soluble molecules cannot fit between the hydroxide particles in the hydrate gel and therefore cannot pass througii the gel layer.
- a variety of new and different lab equipment for DNA separation can be made using this technology.
- the hydrate gel lab filters can form a new and simple alternative to more expensive and complicated commercial DNA purification kits currently available (e.g. those that rely on DNA precipitation).
- EXAMPLE 12 MICRO ALGAE HARVESTING AND THICKENING, SEPARATION OF MICROALGAE OIL IN WATER EMULSION AFTE WET EXTRACTION
- Microalgal species have the potential to be a new renewable source of biofuel feedstock and also provide high value health food products such as omega-3 and carotenoids. Extracted oil from microalgae can be easily converted to biodiesel by
- Biomass can be used as a high source of protein for human nutrition, animal feed or it can be sold as aquaculture feed.
- the biodiesel market is growing rapidly. For example, in the USA by the end of 2006 biodiesel production increased four-fold (from 2004) to more than one billion US gallons.
- High-value health food products from mieroalgae are another rapidly growing area. For example, omega-3 fatty acids occupy a $13 billion, market.
- Carotenoid, . which can be extracted from .rmcroaigae has a $ ⁇ ,4 billion market.
- Phytosterols have a $300 million market, The aquaculture market reached $86 billion in 2009.
- Mieroalgae are essential for shrimp, oyster and scall op hatcheries.
- Tetraselmis algae are sold at a price of about $800/kg of dried biomass, due to high costs of cultivation and centrifugation harvesting.
- Some types of mieroalgae harvesting technologies such as conventional filtration technologies are algae-specific. For example, different flocculants are needed for different algal species. Multi -cultivation i s very hard because harvesting of different types of algae requi re different harvesting technologies. Cross-contamination in algal culture is a very critical problem.
- hydrate filtration technology is not algae-specific and does not need an pre-treatment such as flocculation. Bacterial growth and contamination is a serious problem for recycling water for algae re-cultivation Bacterial growth in alga! cultures is a major problem of outdoor cultivatio systems.
- the hydrate gel filtration system can also solve this problem by capturing bacteri and fungi in water. This process can be used for water treatment of large-scale algae cultivation plants.
- hydrate filtration systems in accordance with embodiments of the present invention ca work without energy and have no moving parts, its simplicity and low cost make it suitable alternative for conventional mieroalgae harvesting processes. It can also solve the main problem of wet oil extraction by breaking oil in water emulsions . It is not algae specific and can harvest any type of mieroalgae, therefore multi -cultivation and cross-contamination problems are solved using this technology. It also sanitises the water, therefore the filtrate water can be recycled and reused for mieroalgae cultivation several times,
- This process does not need any pre-treatment such as floeculation and all contaminants and microalgae are easily collected at top of the hydrate gel.
- the non-sticky nature of the metal hydroxide hydrate layer allows easy separation of harvested algae and this has bee further improved by adding a thin layer of fine fabric or mesh on top of the hydrate gel filter.
- High electric charges of aluminium hydroxide molecules in the hydrate gel are another important driving force for dewatering.
- the hydrate gel not only collects algal species and prevents them from passing the filter, but also naturally dewaters the collected paste more compared to conventional filtrati on systems.
- the electric charges of the metal hydroxide hydrate gel naturally draw in the water molecules that are close to the gel surface, resulting in a thicker (less water) algal paste on top of the gel. This facilitates further processing such as drying and oil extraction.
- Figure 15 shows how a hydrate filter separates micron-sized microalgae
- the microscopic Nile red lipid staining test shows that the lipi ds from the algal oil emulsion were separated and captured on top of the gel
- the filtrate was crystal clear water with no sign of algae or oil droplets.
- a photograph of the Nile red-stained oil that was collected on top of an aluminium hydroxide hydrate filter from such an oil in water emulsion is shown in figure I SA.
- Ha mtococciis phivmiis algae have a high content of the stron antioxidant astaxanthin, which is a carotenoid wit a variety of health benefits and that is in high demand for health food products, aquaculture, pharmaceuticals, and cosmetics industries.
- the market value of astaxanthin is very high at about US$3000 per kg.
- 150 mL of HaemalQC'O 'cus pluvialis algae were added on top of an aluminium hydroxide hydrate gel (made at 20 °C), The Haetnatacaccus cells were harvested and the filtrate was clear water.
- FIG. 16 shows the cross-section view of the gel after filtration. It shows the algal cells collected on top of the gel. The algal cells did not penetrate into the gel but rather they accumulated on top of the gel. This facilitates further the separation of algal cells.
- the self-supporting nature of the aluminium hydroxide hydrate gel is also shown in figure 36. The gel is shown as the white mass in figure 16. The dark geoiextile fabric can be seen underneath the gel in figure 16.
- Alcohols such as methanol and ethanol are polar and water soluble. Therefore the should pass through the hydrate gel.
- 50 mL of pure ethanol and methanol were added to the top of an aluminium hydroxide hydrate gel made at near 100 °C (formula (1)), This test confirmed that both methanol and ethanol molecules pass the hydrate filter. However they passed slower than water, due to their different polarity compared to water molecules. This test revealed that even after 2 hours although all water molecules of a control water test had passed the filter, some alcohol was still on top of the hydrate.
- Molecular polarity is a relative term with one molecule simply being more polar or more non-polar than another. This phenomenon can be used to quantify and measure relative polarities of different molecules compared to water.
- Bovine serum albumin also known as BSA or "Fraction V" is a serum albumin protein derived from cows. It is often used as a protei concentration standard. Crystallised BSA powder was mixed with distilled water to make BSA solution. 50 mL of I millimole/L (3.3 g 50 cc) of BSA solution was added on top of super thick hydrate gel (made at near 100 ( ' )
- aluminium hydroxi de hydrate gel i s the material of first choice for water purification and industrial applications due to its nontoxic nature, strong homogenous gelatinous layer, fast d ewatering rate, and availability and low cost, and ease of production by mixing t wo non-toxic chemicals (aluminium sulphate and sodium bicarbonate), other metal hydroxide hydrates can also be used for some industrial applications where toxicity is not a key issue.
- metal hydroxide may be toxic and hazardous, and also cannot be made by reaction of their sulphates with sodium bicarbonate. They mostly can be made by mixing their salts (such as their sulphates, nitrates and chlorides) ' with sodium hydroxide (caustic soda). They can also be made by electrolysis. For example, copper hydroxide hydrate can be made by electrolysis of a saturated sol ution of magnesium sulphate with copper electrodes and DC current.
- Magnesium hydroxide hydrate can be made by the following equation.
- Magnesium sulphate solution was made by mixing 86.68 g of magnesium sulphate heptahydrate in 500 mL of distilled water. 1 1.59 g of sodium hydroxide was mixed in 50 mL of distilled water. By adding sodium hydroxide solution to the magnesium sulphate solution, the magnesium hydroxide hydrate gel was made. The same filtration equipment used for previous experiments was used. However, another very low pore size fabric (boardshort fabric) was used under the geotextile to capture all magnesium hydroxide hydrate gel. The hydrate gel was added on top of th geotextile. Can-ot juice was added on top of the hydrate gel and allowed to be filtered.
- Zinc hydroxide hydrate can be made by the following equation.
- Zinc sulphate solution was made by mixing 10,27 g of zinc sulphate beptahydrate in. 50 raL of distilled water. 1 ,39 g of sodi um hydroxide was mixed in 10 inL of distilled water. By adding sodium hydroxide solution to the zinc sulphate solution, the zinc hydroxide hydrate gel was made. The same filtration equipment used for previous experiments was used. The hydrate gel was added on top of a geotextile. Carrot juice was added on top of the hydrate gel and allowed to be filtered,
- zinc hydroxide hydrate has a very high potential to be used in water hydrocarbon separation units, or used under very high pres ure, or to be used at the bottom of kerosene and other hydrocarbons storage tanks for separating water and other polar impurities from hydrocarbons such as kerosene.
- Copper compounds are toxic. Copper hydroxide hydrate gel was made b the following reaction:
- Copper sulphate solution was made by mixing 24,96 g of copper ( 11) sulphate pentahydrate in 200 mL of distilled water. 7.998 g of sodium hydroxide was mixed in 10 mL of distilled water. By adding sodium hydroxide solution to the copper sulphate solution, the copper hydroxide hydrate gel was produced. However the moist samples of copper (IT) hydroxide turned black due to the formati on of copper(II) oxide. Therefore, the precoat passed the fabric and copper-based hydrate gels could not be used for different industrial applications.
- Manganese compounds are toxic.
- Manganese hydroxide hydrate gel was made by the tbl lowing reaction:
- Manganese sulphate solution was made by mixing ! 6.89 g of manganese sulphate raonohydrate in 50 nil. of distilled water, 7.998 g of sodium hydroxide was mixed in 10 mL of distilled water. By adding sodium hydroxide solution to the manganese sulphate solution, the manganese hydroxide hydrate gel was produced. The same filtration equipment used for previous experiments was used. The hydrate gel was added on. top of a geotextile. Carrot jui ce was added on top of the hydrate gel and allowed to be filtered.
- Cobalt compounds are toxic.
- Cobalt(H) hydroxide hydrate gel was made by the following reaction:
- Cobalt chloride solution was made by mixing 4,34 g of Cobalt ( ⁇ ) chloride hexahydrate in 100 mL of distilled water. 0.799S g of sodium hydroxide was mixed in 10 mL of distilled water. By adding sodium hydroxide solution to the cobalt chloride solution, the cobalt hydroxide hydrate gel was made. Carrot juice was added on top of the hydrate gel and allowed to be filtered.
- Nickel compounds are highly toxic and can cause cancer or heritable genetic damages.
- Nickel hydroxide hydrate gel was made by the following reaction ;
- Nickel sulphate solution was made by mixin 8,94 g of nickel sulphate hexahydrate in 150 mL of distilled water. 1.27 g of sodium hydroxide was mixed in 20 mL of distilled water. By adding sodium hydroxide solution to the nickel sulphate solution, the nickel hYdroxide hydrate gel was made. Carrot juice was added on top of the hydrate gel and allowed to be filtered.
- nickel hydroxide hydrate gel did. not settle fast and make a homogenous gei layer rapidly. The dewatering rate was very slow.
- beta-carotene molecules were expelled and captured on top of the nickel hydroxide hydrate gel.
- the beta-carotene pigment's colour also turned to dark brown.
- aluminium hydroxide hydrate gel compared to other metal hydroxide hydrates is that it can be made very simply by the reaction of its sulphate solution with non-toxic sodium bicarbonate (baking soda) solution.
- Other metal hydroxide hydrate gels can be made using sodium hydroxide or by more expensive and slower electrolysis.
- other metal hydroxide hydrate gels cannot be made using bakin soda. For example, magnesium sulphate solution was added to sodium bicarbonate solution and no magnesium hydroxide hydrate generation was observed,
- Zinc sulphate reacts with sodium bicarbonate by the following reaction ; ZnS0 4 +2NaHC0 3 — ZnC03+N3 ⁇ 4S04+H 2 (S)
- aluminium hydroxide hydrate gel is preferred by mixing non-toxic chemicals of aluminium sulphate and baking soda or electrolysis of saline water due to their nontoxic nature, there are two other reactions that make aluminium hydroxide hydrate gel using toxic and hazardous chemicals:
- aluminium hydroxide hydrate gels Another way to make aluminium hydroxide hydrate gels is by mixing aluminium nitrate which is a very unstable chemical and a strong oxidising agent, with sodium hydroxide solution by the following equation.
- heating is not desirable for some juices, such as carrot juice, because the heat denatures beta-carotene, and carrot j uice will be converted to a sticky gum-lik e materi al tha t cannot be diluted to carrot juice again.
- concentration of juices by hydrate filtration in accordance with embodiments of the present invention has the potential to keep most nutrients, pigments, flavours and smells in the concentrate.
- a reconstituted carrot juice has a very similar smell as fresh carrot j uice.
- the hydrate filter can concentrate the carrot juice approximatel up to 70 times to a paste-like material.
- the paste can be packaged in a variety of containers for 3 ⁇ 4 variety of products, such as ultra-concentrated carrot juice paste, nutraceuficals, feedstock for beta- carotene extraction, natural skin care or beauty products and other similar cosmetics or food products. It can also be added in different concentrations as additives to a variety of food or cosmetics products.
- the concentrated paste can be redissoived or mixed in water, e.g. for the production of reconstituted juice.
- the product appears si milar to fresh carrot juice, although salts and sugars have passed through the hydrate fil ter and would need to be added for reconsthution. This juice does not tend to settle over time, unlike many reconstituted juices made from heated concentrate. Similar concentrated pastes have been produced from other juices, such as tomato and pomegranate.
- the concentrated paste can also be rapidly air-dried to make a powder that can be used as natural food pigments and/or healt food additives. This powder can be mixed with water to make carrot juice-like drinks,
- the effect of pressure and hydrate thickness were investigated.
- the filtration equipment included a lid that could be closed to allow pressurisation by compressed air.
- the liquid mixture either 1800 ml of Brisbane river water or 200 ml of carrot or watermelon juices
- the lid was closed and compressed air pressure was applied and adjusted.
- the filtrate was collected in a beaker and weighed over time to measure the flow rate and flux .
- This paste (or other similar concentrated pastes from other fruits) can be used to make variety of new food and cosmetic product.
- new breakfast spreads such as carrot, watermelon, tomato, pomegranate, cayenne pepper, apricot, papaya, mango, rockmeion, passionfrait, guava, peach, pear, nectarine, and similar fruits butters can be made.
- These healthy butters can be replaced conventional unhealthy milk or oil based butters that have high amounts of unhealthy saturated and trans fats. Unlike milk butter, they not only do not increase cholesterol level that causes heart di seases, but al so have variety of health benefits.
- this paste can be added to other spreads such as butter for colouring or adding nutritional values or tastes.
- this paste can be used for making new cosmetic products such as beauty creams, masks, soaps or shoer gel s, shampoos, sun protection creams, or natural spray tanning products.
- the high pressure also made the hydrate layer harder than the orange paste collected on top. Therefore, separation of collected carrot juice paste was easy by just scooping.
- the hydrate layer thickness as thin as micron size (for example;, under 500 mi crons, or in the order of tens of microns, or even under 10 microns) by the following process. The following process also makes the thickness of hydrate layer constant across the filter media.
- FIG. 20A The bottom section of an Amdel pressure fi lter unit that was used for previous pressure filtration tests is shown in figure 20A.
- This section is upgraded using a flat sintered titanium filter disk.
- Low dosages of hydrate mixed in water was used to make a very dilute hydrate solution, A very flat and smooth porous filter media can be put under the hydrate layer.
- a sintered titanium disk pore size under 2 micron
- waterproof sealing glue other sealing equipment such as rubber can also be used
- simitar sintered filter media or fine filter media such as porous plastics, or fine fabrics, membranes or filter paper can also be used.
- This sintered titanium is very hard and resistant to high pressure. It also has a very smooth shape that allows a very thin (of the order of less than 500 microns, or less than tens of ttiicrons, : or even less than 10 microns) and consistent layer of hydrate to build up above it (fig.2QC). It is also acid and alkali resistant. Therefore, it is possible to easily acid wash it at end of filtration to avoid accumulation of any deposits inside the filter,
- the sintered titanium filter pores under a microscope (100 times magnified) is shown in Fig.20D.
- filtration flux rates are significantly higher using separators in accordance with embodiments of the present invention when compared to knowing prior art separation technologies.
- known separation technologies include mi erofi Iters, filters, nanofifters and reverse osmosis technology.
- Standard average ultr&filters show a filtration flux of 3 OLMH (litres/m ⁇ /hr)
- standard nanofilters for example, having a pore size under 2nra and operating pressure of 220 to 51 Opsi
- reverse osmosis membranes have an average filtration flux of around 15LMH at 250psi
- standard membrane bioreactors show a flu of 10 to 20LMH.
- fluxes obtained using embodiments of the present invention are show in Are 1 below:
- a simple water treatment system is needed for emergencies. Diarrhoea has been found to be one of the most common illness affecting long-distance hikers in the United States.
- Current survival kits in the market such as water purification tablets, activated carbon filters, and mtcrofilters, are more expensive and less effective than hydrate filtration. technology.
- chlorine tablets that kill pathogens do not remove suspended solids and water is not safe for long-term consumption, Their active ingredients are chlorine and chlorine dioxide, which have health hazards.
- the water is not immediately ready for drinking. The treated water should sit uncovered for several hours so that the chlorine can evaporate.
- The- chlorine- tablet- treated water is still turbid after treatment.
- the filtrate of aluminium hydroxide hydrate filtration is not only free of microorganisms (including pathogens) but also crystal clear and pleasant to drink. After initial rinsing to remove excess salts from the hydrate gel manufacturing, the filtrate of hydrate filtration is also readily available for drinking. Furthermore some pathogens are chlorine resistant, while a hydrate filter can remov bacteria, fungi, microalgae (including blue green algae) and viruses.
- the activated carbon filters need more space than the small amount of gel therefore they are not practical to be carried by hikers or army personnel at all times. Microfilters are too complicated and have several parts, and are also hard to carry. Furthermore, current survival kits are more expensive compared to hydrate filters.
- hydrate filter survival kits capture all suspended solids and microbes and the treated water i s as .clear as distilled water to drink. It has a very simple production and packaging process. Therefore, production factories can be easily implemented with the lowest possible capital and operating costs, with simple equipment For example, a toothpaste tube of gel which can be easily carried by anyone can save lives in emergency situations. It can be easily supplied by helicopter and other means during disaster times such as flood.
- the hydrate filter can capture harmful bacteria and viruses and can prevent dangerous diseases such as diarrhoea among hikers and armed forces. Altematively, the hydrate: gel can be produced at the required location using aluminium sulphate and sodium bicarbonate as shown in formula (1).
- a variet of different survival kits can be made based o thi s technology.
- One simple toothpaste tube packaging of the gel can be put in any survival kit, and be used several times .
- Another sim le packaging of hydrate gel can involve putting the gel on any available fabric during an emergency. For example, the bottom of a sleeve can be tied to make a mini bag, the hydrate gel can be added and then the dirty water can be filtered,
- a ver simple survival kit ca be made just by modifications of normal plastic water bottles. The only modifications needed are cutting the normal bottle of water in two pieces and putting one internal thread on bottom section (see figure 17, reference numeral 21 ) and two external threads on the top section (figure 17, reference numerals 22 and 23).
- the bottle is the same as a normal plastic water bottle. This is shown in figure 18.
- the top section of the bottle can he opened by twi sting and then reversed and connected upside down to the bottom section as show in figure 19.
- the lid is equipped with a fabric like filter medium (see figure 20, reference numeral 24) that will retain the gel.
- the gel will be poured inside and after adding dirty water, the filtrate that is clean water will be collected in the bottom section. After the bottom section is filed, a glass of safe filtrate water without any turbidity and pathogens is ready for drinki g. This cycle can be repeated several times.
- Plastic water bottles are a serious environmental probl em in the world. So many fossil fuels are wasted during their production and transportation. They mostly end up in landfills and take up to 1000 years to break down. This technology may also indirectly hel the environment. It helps people reusing their bottle of water. People and hikers may not throw away their bottle of water because i t i s also their valuable survival kit, and may save their life in emergencies.
- a thick gel can be injected between two glued filter papers (or other similar low pore size media and fabrics) and can be used several times. It can be sealed in a package suited to prevent water loss and drying of the hydrate lab filter. Using these types of packaging the lab filter can be stored for several years. It is also possible to sell tubes of different types of thick gel as filter paper precoats. 200 mL of turbid Brisbane river water were purified using this type of lab filter. The results are similar to other tests and the filtrate was cl ear water. The suspended solids and bacteria were captured on top of the filter which can be collected.
- Hydrate filtration technology has also the potential, to be used for small-scale- applications such as swimming-pools, and be used as a new disinfection and sanitation method. Proper sanitation is needed to maintain the visual clarity of pool water and to prevent the tran smi ssion of infectious diseases.
- filtration is used to remove pollutants such as dirt and debris and chlorine is used to kill infectious organisms.
- Conventional sand or diatomaceous earth filters are normally used as swimming pool filters.
- Conventional filtration processes are not sufficient to completely sanitize the pool' s water; therefore, chlorine and bromine are used as sanitisers for swimming pools.
- a pressure-fed sand filter will generally filter turbid waters of particulates no less than 10 microns, while hydrate filter can separate nanometre particles. Sand filters will normally not remove algae or viruses from the pool water.
- Chlorine-generating compounds used for .disinfection are toxie.
- Disinfection chemicals such as chlorine and other materials present in the water may generate disinfection byproducts (DBPs).
- DBPs result from reactions between organic and inorganic ffiatter in water with chemical treatment agents during the water disinfection process, DBPs are associated with negative effects on human health.
- C oramtne produces N-nitrosodim ethyl amine (NDMA), which is a possible human carcinogen, as well as highly genotoxic iodinated DBFs, such as iodoaeetie acid, when iodide is present in source waters.
- NDMA N-nitrosodim ethyl amine
- Residual chlorine may also react further within the distribution etwork, both by further reactions with dissolved natural organic matter' and with hiofilms present in the pipes.
- pathogens are chlorine resistant, while hydrate filters can remove all bacteria, microalgae (including blue-green algae) and fungi and viruses.
- a swimming pool separation system based on hydrate separation technology captures ail suspended solids and the filtrate is clear water. In a single stage, all suspended solids and bacteria and fungi are captured so there is no need for further problematic disinfection processes.
- hydrate filtration technology there is no need for using toxi chlorine disinfection, so no toxic chlorine disinfection by-products (DBPs) are generated using this technology.
- the swimming pool market is large, for example, 1.1.7% of Australian homes have swimming pools.
- this technology specifically can be used for public swimming pools or those of luxury houses, five star hotels and resorts.
- the hydrate gel ca be used in a variety of conventional filtration systems and different shapes such as rotary drum filters, vacuum filters and conveyor filters. However, it is also possible to simply scale-up the small -scale filtration test equipment used in previous examples detailed above, A strong structure is needed to support the bottom fabric, such as holed galvanised metal sheet or metal mesh. To avoid gel destruction it is possible to fine-spra the liquid into the tank until the water depth is high enough, to enable rapid filling of the tank. It is also possible to put a fabric or similar hard porous metal or plastic on top of the hydrate gel, or put some baffles under the feed pipe. Another design is shown in figure 22 in which a smaller diameter region 28 houses the hydrate gel . Water is fed onto sloping floor 30 and runs down off sloping floor 30 onto the hydrate gel in the section 28. Thus, this design may not need fine
- Hydrate membrane separators can be designed in variety of shapes and systems. It can al so be designed similar to conventional reverse osmosi s membranes (fig,28). In thi s design water molecules are on both sides of the hydrate layer, and all. sections of the hydrate layer will- be soaked completely in water any time during the filtration process. Therefore, the ratio of the number of water molecules to metal hydroxide molecules will be consistent in each section of the hydrate. Thi s can be an advantage in some applications.
- One possible larger scale, conceptual design of this system, is show in fig.28. A. compressor or other similar pressure equipment applies pressure in one side of the filter.
- Another design of a ' hydrate filter unit can be cross flow (tangential), in this design the feed flow travels tangentially across the surface of the hydrate filter, rather than into the filter (fig.30).
- the main advantage of this design is that unlike the batch like dead end filter, the filter cake is washed away, allowing the process to be continuous rather than batch. Using this design less blinding occurs compared to dead-end design.
- a pump can recycle and recirculate the feed several times round the unit until the desired concentration achieved and the concentrated retentate is transferred out of the unit.
- the technology can al so be used in industrial microbiology processes and pharmaceutical processes, especially to address highly expensive dewatering and separation requirements to isolate the desired products.
- the technology can al so be used to treat mine effluents and in wastewater treatment. Furthermore, some precious components such as gold may be lost as suspended solids in mine effluents. It is also possible to recover precious suspended solid materials such as small gold particles or coal dust from mine effluents.
- Agarose gel (2%) is made by mixing 2 g of agar in 100 mL of distilled water and heating for one minute in a microwave. In heated liquid state it passes through the geotextile fabric that has been used to retain the hydroxide hydrate layers of the earlier examples given in this specification. The filtration equipment was then soaked and the agarose gel allowed to solidif by cooling. Brisbane river water was added on top of the gels. While the aluminium hydroxide hydrate gel filters the water fast, not even a drop of water passed the agarose gel. Even after several days no drop of water passed the agarose gel.
- Figure 23 shows a basic desig of a hydrate gel separator in accordance with an embodiment of the present invention.
- the components shown in figure 23 that are positioned above the clean water will normally be located within a housing.
- the housing will normally have side walls that retain the holding fabric, the hydrate gel filter, the surface fabric and the mixture of water with particles.
- the housing will typically have a porous or permeable bottom located directly below the holding fabric.
- the separator comprises a holding fabric, which may be a geotextile- fabric or any other fabric that has pore size that is sufficiently small to retain the hydrate gel.
- the hydrate gel l ayer is held on top of the holding fabric and is retained by the holding fabric.
- An optional surface fabric may be positioned on top of the hydrate gel layer if it is desired to recover particles or other components separated from the mixture.
- the mixture of water and particles (or other components, suc as microorganisms or non-polar molecules or hydrophobic molecules) is positioned above the hydrate gel layer. Water, dissolved salts and polar liquids can pass through the hydrate gel layer and as a result, these components are separated fro the other components that cannot pass through the hydrate gel iayer.
- the components that pass through the hydrate gel layer can be collected in the "clean water” below the hydrate gel layer.
- the components that cannot pass through the hydrate gel layer accumulate on the top of the surface fabric (when the surface fabric is present) or, in the absenc of the surface fabric, on top of the hydrate gel layer.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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Abstract
Description
Claims
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AU2013904667A AU2013904667A0 (en) | 2013-12-02 | Separator | |
PCT/AU2014/050389 WO2015081384A1 (en) | 2013-12-02 | 2014-12-02 | Separator |
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EP (1) | EP3077071B1 (en) |
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US10933381B1 (en) * | 2011-04-26 | 2021-03-02 | Mansour S. Bader | Relative wettability: wet oil separation by a membrane |
US10525415B2 (en) * | 2017-06-15 | 2020-01-07 | Saudi Arabian Oil Company | Processing systems for produced water and methods for recovering organic compounds from the produced water |
KR102136695B1 (en) * | 2018-08-22 | 2020-07-22 | 주식회사 인퓨전텍 | Method for pathogen enrichment and nucleic acid extract using device for point of care testing |
WO2023141682A1 (en) * | 2022-01-31 | 2023-08-03 | Blue Quest Group Pty Ltd | A filtration assembly and method of use thereof |
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GB1462878A (en) | 1973-10-10 | 1977-01-26 | Sperry Rand Ltd | Flow sensors |
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EP0195877A1 (en) * | 1985-03-26 | 1986-10-01 | Fritz Wegmueller | Process for depositing a uniform metal hydroxide layer on substrates and for extracting metals in solution |
US5051189A (en) | 1989-01-31 | 1991-09-24 | University Of Florida | Method of removing an unwanted impurity from an aqueous material |
JP3470153B2 (en) | 1992-07-20 | 2003-11-25 | ジャパンゴアテックス株式会社 | Metal oxide composite polymer porous body and method for producing the same |
CA2093676C (en) * | 1993-04-08 | 2004-08-31 | K. Anwer Mehkeri | Method for ultra-trace level analysis of water |
EP0679405A1 (en) * | 1994-04-25 | 1995-11-02 | Rotkreuzstiftung Zentrallaboratorium Blutspendedienst Srk | Method for separating viruses from protein solutions |
US6187192B1 (en) * | 1999-08-25 | 2001-02-13 | Watervisions International, Inc. | Microbiological water filter |
US20050098495A1 (en) | 2001-03-02 | 2005-05-12 | Hughes Kenneth D. | Purification materials and method of filtering using the same |
US8323603B2 (en) | 2004-09-01 | 2012-12-04 | Sud-Chemie Inc. | Desulfurization system and method for desulfurizing a fuel stream |
US7442293B2 (en) * | 2005-01-14 | 2008-10-28 | Jyonan Electric Industrial Corporation Limited | Oil/water separation apparatus for oil-containing mixture |
JP4854999B2 (en) | 2005-07-20 | 2012-01-18 | 株式会社日本海水 | Fluorine adsorbent and process for producing the same |
US8007671B2 (en) * | 2005-08-15 | 2011-08-30 | Streamline Capital, Inc. | Microfiltration devices |
EP2155613A1 (en) * | 2007-04-18 | 2010-02-24 | H2q Water Industries LTD. | Filter medium |
CN101507911B (en) | 2008-11-11 | 2011-06-29 | 中国科学院生态环境研究中心 | Defluorination absorbing material based on aluminum base composite oxides and its preparation method and use and special device of the preparation method |
JP2011200818A (en) * | 2010-03-26 | 2011-10-13 | Namura Denki Kogyo Kk | Filter for cleaning and cleaning method |
WO2012018890A2 (en) * | 2010-08-06 | 2012-02-09 | Arizona Board Of Regents For And On Behalf Of Arizona State University | Fabricating porous materials using intrepenetrating inorganic-organic composite gels |
JP2012157850A (en) * | 2011-01-31 | 2012-08-23 | Fukuhara Co Ltd | Oil adsorption tank of sewage and method for replacing oil treatment material |
WO2013051013A2 (en) * | 2011-07-28 | 2013-04-11 | Tata Consultancy Services Limited | Water purification device |
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EP3077071A4 (en) | 2017-08-09 |
CN105934263B (en) | 2021-08-24 |
EP3077071B1 (en) | 2021-11-03 |
ES2908318T3 (en) | 2022-04-28 |
AU2020256448B2 (en) | 2022-11-10 |
AU2014360673A1 (en) | 2016-07-14 |
US11866347B2 (en) | 2024-01-09 |
AU2019201090A1 (en) | 2019-03-07 |
EA201691163A1 (en) | 2016-11-30 |
US20160304358A1 (en) | 2016-10-20 |
NZ721504A (en) | 2021-12-24 |
EA032043B1 (en) | 2019-03-29 |
BR112016012494B1 (en) | 2022-07-12 |
AU2020256448A1 (en) | 2020-11-12 |
WO2015081384A1 (en) | 2015-06-11 |
CL2016001315A1 (en) | 2018-02-16 |
JP6647201B2 (en) | 2020-02-14 |
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